John Kampen Books

The Hasideans and the origin of Pharisaism

By John Kampen

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The Hasideans and the origin of Pharisaism

By John Kampen

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The Religion of the Maya Iconography of Religions Section 11 Ancient America

By M. E. Kampen

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Matthew Within Sectarian Judaism

By John Collins, John Kampen, Collins, John, Jr.

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A renowned scholar of the Dead Sea Scrolls argues for reading the Gospel of Matthew as the product of a Jewish sect In this masterful study of what has long been considered the “most Jewish” gospel...

Pursuing the Text

By John C. Reeves, John Kampen

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Hebrew Union College and the Dead Sea Scrolls

By John Kampen, Jason Kalman

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Pursuing the Text

By John C. Reeves, John Kampen

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.